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1 8-38
1977 PONTIAC SERVICE MANUAL
MAJOR A-6 COMPRESSOR REPAIR PROCEDURES
Service repair procedures to the Compressor
Shaft
Seal
and
Pressure
Relief
Valve
or
disassembly
of
the
Internal
Compressor
Mechanism are considered "MAJOR" SINCE THE
REFRIGERATION
SYSTEM
MUST
BE
COMPLETELY PURGED OF REFRIGERANT before
proceeding
and/or
because
major
internal
operating
and
sealing
components of
the
compressor are being disassembled and serviced.
A clean workbench, preferably covered with a sheet of
clean paper, orderliness in the work area and a place for all
parts being removed and replaced is of great importance, as
is the use of the proper, clean service tools. Any attempt to
use make-shift or inadequate equipment may result in damage
and/or improper compressor operation.
These procedures are based on the use of the proper
service tools and the condition that an adequate stock of
service parts is available.
All parts required for servicing are protected by a
preservation process and packaged in a manner which will
eliminate the necessity of cleaning, washing or flushing of the
parts. The parts can be used in the mechanism assembly just
as they are removed from the service package.
Piston shoe discs and shaft thrust races will be identified
by "number" on the parts themselves for reference to
determine their size and dimension (see Fig. 1B-68).
A-6 COMPRESSOR SHAFT SEAL
SEAL LEAK DETECTION
A SHAFT SEAL SHOULD NOT BE CHANGED
BECAUSE OF AN OIL-LINE ON THE HOOD
INSULATOR. The seal is designed to seep some oil
for lubrication purposes. Only change a shaft seal when a leak
is detected by the following procedure.
When refrigerant system components other than the
compressor are replaced, the compressor must be removed
and oil drained from the compressor if oil was sprayed in
large amounts due to leaks or a broken shaft seal.
Compressor shaft seals, unless replaced during a
compressor overhaul, are to be replaced only on the basis of
actual refrigerant leakage as determined by test with
Electronic Leak Detector, J 23400.
WHEN
REPLACING
THE
SHAFT
SEAL
ASSEMBLY, even'if the compressor remains on the vehicle
during the operation, IT WILL BE NECESSARY TO
PURGE THE SYSTEM OF REFRIGERANT as outlined
earlier in the Service Manual. (See "Discharging, Adding Oil,
Evacuating and Charging Procedures for C.C.O.T. A/C
Systems".)
Remove
1. After first purging the system of refrigerant, remove
the clutch plate and hub assembly and shaft key as described
in "Compressor Clutch Plate and Hub Asm." Removal
procedure.
2. Pry out the sleeve retainer and remove the absorbent
sleeve. Remove the shaft seal seat retaining ring, using Snap-
Ring Pliers J 5403 (#21). See Figure 1B-45.
3. Thoroughly clean inside of compressor neck area
surrounding the shaft, the exposed portion of the seal seat and
the shaft itself. This is absolutely necessary to
prevent any dirt or foreign material from getting
into compressor.
4. Place Seal Protector J 22974 over the end of the shaft
to prevent chipping the ceramic seat. Fully engage the
knurled tangs of Seal Seat Remover-Installer J 23128 into the
recessed portion of the seal seat by turning the handle
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